GIVE YOUR AGENT THE EVIDENCE

Set up in your agent.

One prompt to get started. Paste it into your coding agent to connect cve.new through MCP and bring vulnerability context into your workflow.

Your agent needs remote MCP support and access to https://cve.new/mcp.

Read the setup guide

GIVE YOUR AGENT THE EVIDENCE

Investigate in your agent.

Turn this advisory into a focused investigation. Ask your agent to check your project’s versions, explain the evidence, and suggest a compatible fix.

Your agent needs remote MCP support and access to https://cve.new/mcp.

Read the setup guide

cve.new
Check your stack
GHSA-jp3q-wwp3-pwv9low2.1

Freeform Craft Plugin CP UI (builder/integrations) has Stored Cross-Site Scripting (XSS) issue

Impact

Summary An authenticated, low-privilege user (able to create/edit forms) can inject arbitrary HTML/JS into the Craft Control Panel (CP) builder and integrations views. User-controlled form labels and integration metadata are rendered with dangerouslySetInnerHTML without sanitization, leading to stored XSS that executes when any admin views the builder/integration screens.

Source excerpt · OSV

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

Original source description

Summary An authenticated, low-privilege user (able to create/edit forms) can inject arbitrary HTML/JS into the Craft Control Panel (CP) builder and integrations views. User-controlled form labels and integration metadata are rendered with dangerouslySetInnerHTML without sanitization, leading to stored XSS that executes when any admin views the builder/integration screens.

Affected Product

  • Ecosystem: Packagist (Craft CMS plugin)
  • Package: solspace/craft-freeform
  • Version: <= 5.14.6 (latest observed). Likely all 5.x until patched.

Details

  • Root cause: Multiple user-controlled strings (field labels, section labels, integration icons, short names, WYSIWYG previews) are injected into React components using dangerouslySetInnerHTML without sanitization.
  • Evidence: dangerouslySetInnerHTML on user-controlled properties in bundled CP JS at packages/plugin/src/Resources/js/client/client.js.

PoCs

  • Label-based XSS:
    1. In Craft CP, create/edit a Freeform field and set its label to <img src=x onerror="alert('xss-label')">.
    2. Open the form builder view containing the field.
    3. Alert executes (stored XSS).
  • Integration icon SVG:
    1. Set an integration "icon SVG" to <svg><script>alert('xss-icon')</script></svg>.
    2. Open the integrations CP view.
    3. Script executes.

Impact Arbitrary JS in admin CP; session/CSRF token theft; potential full admin takeover via DOM-driven actions.

Remediation

  • Sanitize/HTML-encode all user-controlled strings before passing to dangerouslySetInnerHTML, or avoid it for labels/titles/icons.
  • Server-side: strip/escape disallowed tags on save for fields, integration metadata, WYSIWYG content.
  • Add regression tests with <img onerror> payloads to ensure no execution in builder/integration views.

Workarounds

  • Restrict form-edit permissions to trusted admins only until patched.
  • Consider CSP that disallows inline scripts (defense-in-depth only).

Credits

References